This mech paper model is Hellbringer (Loki), a very widespread design developed by Clan Hell's Horses, from the game Classic BattleTech, the papercraft is created by Yogsolthan and Smoking Mirror, skins by Sturm.
However, due to its poor armor, the Hellbringer is often passed over for more robust OmniMechs. The Inner Sphere first encountered the Hellbringer facing Clan Jade Falcon, which favors the design for its immense offensive potential. Earning the codename Loki by Galen Cox, an AFFC officer who declared each of the Hellbringer's various versions as an "utterly mad configuration," the 'Mech does at first glance appear to be highly unusual, mounting a spread of weapons, anti-personnel equipment and electronics. The Hellbringer utilizes a standard internal structure, and has decent mobility, with a top speed of 86.4 km/h. Though it has vast firepower at its disposal, the design is not particularly durable, mounting a mere eight tons of Standard armor, and the Hellbringer is not particularly suitable for defensive situations or extended engagements.
In the aftermath of the Battle of Tokasha and the loss of Tokasha Mechworks, the Hell's Horses began developing several OmniMechs. Only the Hellbringer met with success. Development time for the Hellbringer was reduced through the use of moulds used in the Summoner. Despite the poor armor, the Hellbringerdevotes almost 43% of its mass to pods, allowing for great offensive potential. The design spread quickly after its introduction for two reasons: the Horses promptly lost the primary production facility, and used their remaining production to curry favor with other Clans through trade and gifts.
After The Wars of Reaving in Clan Space, the Hellbringer would fall out of favor with the surviving Clans due in part to its association with the Inner Sphere based Clans. The design would be replaced in military service of those in Clan Space, with the exception of Clan Coyote which still fields the 'Mech. [Source: sarna]
You can download the papercraft model here: Classic BattleTech - Hellbringer (Loki) Free Mech Paper Model Download [Skins]